Write a cool script? Send it to sk89q (somehow) or you can submit a pull
request on https://github.com/sk89q/worldedit. He will consider your script
for inclusion in WorldEdit releases. Please license your script with a
permissive open source license such as GPLv2, MIT, BSD, WTFPL, etc.

Note: Legally you should not release things to the public domain as not
all countries have the concept of public domain in their copyright law.

You can also post your scripts here:
http://forum.sk89q.com/forums/craftscripts.6/